target/ppc: implement vclrrb

Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br> Message-Id: <20220225210936.1749575-17-matheus.ferst@eldorado.org.br> Signed-off-by: Cédric Le Goater <clg@kaod.org>
qemu · Mar 2, 2022 · fb1b567 · fb1b567
1 parent 08d512e
commit fb1b567
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Showing 2 changed files with 25 additions and 8 deletions.
diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
@@ -530,6 +530,7 @@ VSTRIHL         000100 ..... 00010 ..... . 0000001101   @VX_tb_rc
 VSTRIHR         000100 ..... 00011 ..... . 0000001101   @VX_tb_rc
 
 VCLRLB          000100 ..... ..... ..... 00110001101    @VX
+VCLRRB          000100 ..... ..... ..... 00111001101    @VX
 
 # VSX Load/Store Instructions
 

diff --git a/target/ppc/translate/vmx-impl.c.inc b/target/ppc/translate/vmx-impl.c.inc
@@ -1940,7 +1940,7 @@ TRANS(VSTRIBR, do_vstri, gen_helper_VSTRIBR)
 TRANS(VSTRIHL, do_vstri, gen_helper_VSTRIHL)
 TRANS(VSTRIHR, do_vstri, gen_helper_VSTRIHR)
 
-static bool trans_VCLRLB(DisasContext *ctx, arg_VX *a)
+static bool do_vclrb(DisasContext *ctx, arg_VX *a, bool right)
 {
     TCGv_i64 rb, mh, ml, tmp,
              ones = tcg_constant_i64(-1),
@@ -1954,15 +1954,28 @@ static bool trans_VCLRLB(DisasContext *ctx, arg_VX *a)
     tcg_gen_extu_tl_i64(rb, cpu_gpr[a->vrb]);
     tcg_gen_andi_i64(tmp, rb, 7);
     tcg_gen_shli_i64(tmp, tmp, 3);
-    tcg_gen_shl_i64(tmp, ones, tmp);
+    if (right) {
+        tcg_gen_shr_i64(tmp, ones, tmp);
+    } else {
+        tcg_gen_shl_i64(tmp, ones, tmp);
+    }
     tcg_gen_not_i64(tmp, tmp);
 
-    tcg_gen_movcond_i64(TCG_COND_LTU, ml, rb, tcg_constant_i64(8),
-                        tmp, ones);
-    tcg_gen_movcond_i64(TCG_COND_LTU, mh, rb, tcg_constant_i64(8),
-                        zero, tmp);
-    tcg_gen_movcond_i64(TCG_COND_LTU, mh, rb, tcg_constant_i64(16),
-                        mh, ones);
+    if (right) {
+        tcg_gen_movcond_i64(TCG_COND_LTU, mh, rb, tcg_constant_i64(8),
+                            tmp, ones);
+        tcg_gen_movcond_i64(TCG_COND_LTU, ml, rb, tcg_constant_i64(8),
+                            zero, tmp);
+        tcg_gen_movcond_i64(TCG_COND_LTU, ml, rb, tcg_constant_i64(16),
+                            ml, ones);
+    } else {
+        tcg_gen_movcond_i64(TCG_COND_LTU, ml, rb, tcg_constant_i64(8),
+                            tmp, ones);
+        tcg_gen_movcond_i64(TCG_COND_LTU, mh, rb, tcg_constant_i64(8),
+                            zero, tmp);
+        tcg_gen_movcond_i64(TCG_COND_LTU, mh, rb, tcg_constant_i64(16),
+                            mh, ones);
+    }
 
     get_avr64(tmp, a->vra, true);
     tcg_gen_and_i64(tmp, tmp, mh);
@@ -1980,6 +1993,9 @@ static bool trans_VCLRLB(DisasContext *ctx, arg_VX *a)
     return true;
 }
 
+TRANS(VCLRLB, do_vclrb, false)
+TRANS(VCLRRB, do_vclrb, true)
+
 #define GEN_VAFORM_PAIRED(name0, name1, opc2)                           \
 static void glue(gen_, name0##_##name1)(DisasContext *ctx)              \
     {                                                                   \